Home / 1,208,128.70-1,811,061.30-408,850.70

Finding the Fourth Proportional to 1,208,128.70, 1,811,061.30 and 408,850.70

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Solution

The fourth proportional to 1,208,128.70, 1,811,061.30 and 408,850.70 is: 612,893.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,128.70 : 1,811,061.30 = 408,850.70 : x
  2. Step 2: Convert to fraction form
    1,208,128.70/1,811,061.30 = 408,850.70/x
  3. Step 3: Cross multiply
    1,208,128.70x = 1,811,061.30 × 408,850.70
  4. Step 4: Simplify right side
    1,208,128.70x = 740,453,680,247.91
  5. Step 5: Solve for x
    x = 740,453,680,247.91/1,208,128.70
  6. Step 6: Final answer
    x = 612,893.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.